Prestressed concrete pressure vessel
Abstract
Abstract A SUBSTANTIALLY CYLINDRICAL PRESSURE VESSEL HAS AT LEAST ONE REMOVABLE END STRUCTURE SO AS TO PROVIDE AN OPENING WHICH PRACTICALLY CORRESPONDS IN DIAMETER TO THE INTERIOR OF THE VESSEL. THE REMOVABLE END STRUCTURE COMPRISES FROM THE INTERIOR TO THE EXTERIOR OF THE VESSEL IN THE AXIAL DIRECTION AN OUTWARDLY-FLARED BEARING FACE FORMED ON A CORNICE OF THE INTERNAL VESSEL WALL, A REMOVABLE SLAB TIGHTLY APPLIED AGAINST THE BEARING FACE, A FLARED ABUTMENT FACE FORMED IN THE INTERNAL VESSEL WALL AND AN ASSEMBLY OF WEDGE-SHAPED ELEMENTS EACH OCCUPYING AN ANGULAR SECTOR AND FORCIBLY APPLIED AGAINST THE ABUTMENT FACE. THE REMOVABLE SLAT IS APPLIED AGAINST THE BEARING FACE WITH VARIABLE PRESSURE BY MEANS OF FIRST JACKS MOUNTED BETWEEN THE SLAB AND THE WEDGE ASSEMBLY. THE WEDGE ASSEMBLY IS APPLIED AGAINST THE ABUTMENT FACE EITHER BY MEANS OF SECOND JACKS MOUNTED BETWEEN THE CORNICE AND THE ASSEMBLY OR BY MEANS OF TENSIONED CABLES PASSED THROUGH THE CYLINDER WALL AT RIGHT ANGLES TO THE ABUTMENT FACE.
Inventors
- 👤 Jean-Louis Cruset
- 👤 Pierre Launay
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |